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Open AccessArticle

Partition and Fate of Phthalate Acid Esters (PAEs) in a Full-Scale Horizontal Subsurface Flow Constructed Wetland Treating Polluted River Water

1
College of Water Sciences, Beijing Normal University, Beijing 100875, China
2
College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
3
School of Environment, Tsinghua University, Beijing 100084, China
*
Authors to whom correspondence should be addressed.
Water 2020, 12(3), 865; https://doi.org/10.3390/w12030865
Received: 18 February 2020 / Revised: 15 March 2020 / Accepted: 16 March 2020 / Published: 19 March 2020
(This article belongs to the Section Water Quality and Ecosystems)
When used as highly produced chemicals and widely used plasticizers, Phthalate acid esters (PAEs) have potential risks to human life and the environment. In this study, to assess the distribution and fate of PAEs, specifically inside a full-scale horizontal subsurface flow constructed wetland, four PAEs including dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalate (DBP), and bis (2-ethylhexyl) phthalate (DEHP) were investigated. In effluent, PAEs concentration decreased 19.32% (DMP), 19.18% (DEP), 19.40% (DBP), and 48.56% (DEHP), respectively. Within the wetland, PAEs partitioned in water (0.18–1.12 μg/L, 35.38–64.92%), soil (0.44–5.08 μg/g, 1.02–31.33%), plant (0.68–48.6 μg/g, 0.85–36.54%), air and biological transformation (2.72–33.21%). The results indicated that soil and plant adsorption contributed to the majority of PAE removal, digesting DMP (19.32%), DEP (19.18%), DBP (19.40%), and DEHP (48.56%) in constructed wetlands. Moreover, the adsorption was affected by both octanol/water partition coefficient (Kow) and transpiration stream concentration factors (TSCF). This work, for the first time, revealed the partition and fate of PAEs in constructed wetlands to the best of our knowledge. View Full-Text
Keywords: balance; constructed wetlands; full scale; phthalate acid esters balance; constructed wetlands; full scale; phthalate acid esters
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Zheng, L.; Liu, T.; Xie, E.; Liu, M.; Ding, A.; Zhang, B.-T.; Li, X.; Zhang, D. Partition and Fate of Phthalate Acid Esters (PAEs) in a Full-Scale Horizontal Subsurface Flow Constructed Wetland Treating Polluted River Water. Water 2020, 12, 865.

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